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l. SERVICE.

` Tool Rest for Laths. No. 60,266. f Patented Dec. `4,1866.

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SPECIFICATION.

TO ALL WHOM IT MAY CONCERN: .i

Be it known that I, JAMES-SERVICE, of Greenville, in the county of New London, and State of Connecticut, have invented a new and improved Tool-Rest for Lathes; andrI do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of `thisl specification, in whichi Figure lisa side elevation of the tool-rest.

Figure 2 is a longitudinal section taken in a vertical plane through the centre of the rest.

Figure 3 is a top view. w

Figureli is a bottom view. y

Figure 5 is a perspective view of the movable portion which carries the tool-slide.

Similar letters of .reference indicate corresponding parts in the several figures. i i

.This invention relates to that portion of a turning-lathe whichis designed for supporting the tool.,` The" invention consists in providing for elevating or depressing the tool-rest in a perpendicular line, without loosening the tool in the holder, by means of an adjusting-screw and horizontal spur-wheels, arranged so that the operator can raise or lower the tool, b ylmeans of a lever which is located on one side of the restfstandard, as` p y will be hereinafter described. To enable others skilled in the art to understand my invention, I will `describe its construction and operation.

The vertical standard, A, oi'` the tool-rest, is constructed. with a wide'base, A', for seating it firmly on the I lathe-frame, and also for receiving a spur-wheel, B. The tool-rest .consists of a horizontally-s.otted head,'"C, having a rectangular stem or shank, C,'formed on it, which shank is fitted to work up and down, in a chamberwhich is formed in the vertical portion of the standard, as shown in the drawings. The head, C, of the tool-rest, may be. slotted inthe usual manner for receiving, guiding, and holding down the tool-holder. i A. hole is made verticallythrough the centre of the tool-rest and tapped with a screw-thread for receiving the screw-shaft, D.

This screw is reduced in .diameter at its lower end so as to form the shoulder, a, and the reduced portion is passed through the bottom of the standard, A, and provided with a pinion spur-wheel, E, which is keyed on the i screw and fitted into a recessformed inthe bottom ot' the standard base, as shown i'n figs. `2 and 4. The spur` wheel E engages with the teeth of the spur-wheel B, which latter is also recessed into the base of the standard `so as to allow this standard to rest firmly upon the latter frame. Wheel B is keyed on4 the lower end of a short i shaft, F, which passes up through the base-plate, AI', and receives upon it a collar, b, and square head,il By applying the movable wrench, G, to the head,'b, the spur-wheel, B, can be rotated either to the right or left,

which will raise or lower the tool-rest in a perpendicular line. It will be seen that the toolrest is fitted to worky snugly in the standard, A, and that it can be raised or lowered at pleasure without causing it to wabblc" and loosening either the tool, tool-holder, or other parts constituting the tool support. i

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is The combination of the screw D, and pinion and spur-wheels B E, with the lathe tool-rest, arranged 4and operating substantially in the manner and for the purpose herein described. i

`JAMES SERVICE;

Witnesses:

WM. H. PAGE, JAMES D. HIGGINS. 

